drivers/platform/x86/amd: pmf: Check for invalid sideloaded Smart PC Policies

drivers/platform/x86/amd: pmf: Check for invalid sideloaded Smart PC Policies

If a policy is passed into amd_pmf_get_pb_data() that causes the engine
to fail to start there is a memory leak. Free the memory in this failure
path.

Fixes: 10817f28e5337 ("platform/x86/amd/pmf: Add capability to sideload of policy binary")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20250423132002.3984997-2-superm1@kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>